John laird



(No Model.)

J. LAIRD. PRESSER CLAMP FOR BUTTONHOLE SEWING MACHINES. N0. 606,423.PatentedJune 28,1898.

m: nanmymns cu, Guam-mac" WASHINGTON. n. cy

NiTE- JOHN LAIRD, OF BELFAST, IRELAND, ASSIGNOR oETwo-Tnmos To TuE HOPESTREET FACTORY, LIMITED, oEsAME PLACE.

PRESSER-CLAMP FORBUTTONHOLE-SEWING MACHINES.

SPECIFICATION forming part of Letters Patent NO. 606,423, dated June 28,1898. Application filed September 29, 1896. Serial No. 607,324. (Nomodel.)

To aZZ whom it may concern.-

Be it known that 1, JOHN LAIRD, a subject of the Queen of Great Britainand Ireland, residing at 4 Hibernia place, Lisburn road, Belfast,Ireland, have invented an Improved Presser- Clamp for Buttonhole-SewingMachines, of which the following is a specification. The object of myinvention is to enable the presser-clamp of a buttonhole-sewin g machineto move more freely than has heretofore been the case, both lengthwiseand laterally, and bear with even pressure on material of irregularthicknessas, for instance, in the case of shirt parts, where there is anextra thickness of material near the front collar-buttonhole of ashirt-front at the point where the collar or collar-band isattached tothe front, or similarly in a cuff, where at the stud-holes theinter-lining is cut away and thus thinned to allow the stud to be moreeasily inserted. With this view I hinge the presser-clamp to a frame,said frame being hinged to the clamp-plate in such a m anner that thepresserclamp, with the frame, is free to vibrate in,

one direction or plane within the clamp-plate, while at the same timethe presser-clamp is free to vibrate within the frame in a'direction orplane at right angles to the Vibration of the frame within theclamp-plate.

I will now proceed to describe, with reference to the accompanyingdrawings, the manner in which my invention is to be performed. A

Figure 1 is a plan of the clamp-plate, showing the presser-clamp andframe in place as applied, for example, to a buttonhole-sewing machinedescribed in myUnited States Patent No. 562,003, of June 16, 1896. tionon the line 2 2, Fig. 1. on the line 3 3, Fig. 1.

The presser-clamp u is provided on the upper side with a smalllug u ateach end and Fig. 2is a sec- Fig. 3 is a section equidistant from eitherside. These lugs are.

drilled to receive hinge pins 24 secured in corresponding lugs a on theupper side of a frame 20 which carries and surrounds the resser-clamp u.Sufficient clearance only is left between the sides of the presser-clampa and the frame a to allow the resser-clamp a limited vibration on thehinge-pins 14 On the upper side of the frame id, at the sides of thesame and equidistant from either end, are two other lugs 10 which aredrilled in the same longitudinal plane as the hinge-pins a to receivehinge-pins a, secured to the upper side of the clamp-plate Uor to lugs10 thereon. Suificient clearance only is left between the ends of theframe a and the clamp-plate U to allow the frame a limited vibration onthe hinge-pins u on the clamp-plate.

The clamp-plate may be attached to the machine in the ordinary way or inany convenient manner. tained by fitting the presser-clamp u withhinge-pins at each'side instead of at each end within the frame whilethe frame a is fitted with hinge-pins at each end instead of at eachside within the clamp-plate U. i

That I claim, and desire to secure by Letters Patent, is-

1. A sewing-machine clamp-plate, a frame journaled in an opening thereofand having a limited movement on its journals, and a clamping-footjournaled in said frame and having its journals in the same horizontalplane but at right angles to the frame-journals, said clamping-foothaving likewise. a limited movement on its said journals, for thepurpose set forth,

2. A sewing-machine c1amp-plate, a foursided open frame pivoted atopposite ends in an opening thereof and a four-sided clamping frame orfoot pivoted at two opposite sides in the opening of the first-mentionedframe at right angles to its pivots, all the pivot-centersbeing in thesame horizontal plane and both frames having limited movement,-for thepurpose set forth.

3. A sewing-machine clamp-plat e, a frame pivoted in an opening thereofand projecting slightly below said plate and a clampingframe pivoted atright angles to, and within the first l mentioned frame and projectingslightly below said frame, all the pivots being in the same plane andthe frames having limited motion.

JOHN LAIEn.

Witnesses: A

ALBERT A. SMYTH, R. H. ATKINSON.

